Docker : Use Dockerfile#2

Use Dockerfile and create Docker images automatically. It is also useful for configuration management.
[1]	For example, Create a Dockerfile to install httpd and add index.html, and also start httpd with 80 port.

[root@dlp ~]#  vi Dockerfile # create new FROM centos MAINTAINER serverworld <admin@srv.world> RUN yum -y install httpd RUN echo "Hello DockerFile" > /var/www/html/index.html EXPOSE 80 CMD ["-D", "FOREGROUND"] ENTRYPOINT ["/usr/sbin/httpd"] # build image ⇒ docker build -t [image name]:[tag] .  [root@dlp ~]#  docker build -t web_server:latest .  Sending build context to Docker daemon 10.24 kB Step 0 : FROM centos ---> 7322fbe74aa5 Step 1 : MAINTAINER serverworld <admin@srv.world> ---> Running in fa5364b3d41f ---> 57d8fd36b7f7 ..... ..... Removing intermediate container 3efa8e1dcae9 Successfully built 7c39aaa338b4 [root@dlp ~]#  docker images  REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE web_server latest 7c39aaa338b4 24 seconds ago 283.9 MB docker.io/centos latest ce20c473cd8a 8 weeks ago 172.3 MB # run Container on background [root@dlp ~]#  docker run -d -p 80:80 web_server  [root@dlp ~]#  docker ps  CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES eda2b1482272 web_server "/usr/sbin/httpd -D F" 35 seconds ago Up 34 seconds 0.0.0.0:80->80/tcp mad_bhabha [root@node02 ~]#  curl http://localhost/  Hello DockerFile